Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 58: Quantum Dots: Optical Properties IV

HL 58.8: Vortrag

Mittwoch, 22. März 2017, 17:15–17:30, POT 151

Coherent Control of a Photonic Crystal Microresonator with Electric ReadoutWadim Quiring1, •Björn Jonas1, Jens Förstner1, Ashish K. Rai2, Dirk Reuter1, Andreas D. Wieck2, and Artur Zrenner11Center for Optoelectronics and Photonics Paderborn (CeOPP), Universität Paderborn, Paderborn, Germany — 2Ruhr-Universität Bochum, Bochum, Germany

We present coherent two pulse experiments on GaAs photonic crystal microresonators. The MBE-grown structures have a membrane, which is designed as a n-i layer with an embedded InGaAs quantum well. Metallic contacts with 50 nm dimensions have been processed by e-beam lithography in order to realize a local Schottky gate on the central part of the microresonator. The resulting structures allow for photocurrent detection of cavity excitations at Q-factors around 5000. [1] Resonant and detuned two-pulse ps-laser excitation is used for the coherent excitation and manipulation of the cavity, which is monitored by photocurrent detection via the built-in quantum well. We are able to measure the amplitude and phase of the cavity excitation as a function of the detuning. Our experimental findings are well described by an analytical theory, in which the cavity is treated as a dissipative two-level system. We further show, that our phase sensitive experiments can also be successfully performed at room temperature, which makes real-world applications of cavity based phase control and frequency discrimination feasible.

[1] W. Quiring et al., Appl. Phys. Lett. 107, 041113 (2015)

[2] W. Quiring et al., Optics Express 24, 20672 (2016)

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